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@ 2022-05-08T10:44:46Z

<?php

$var = "some value";

unset($var);

$isnull = is_null($var);
$isnull2 = ($var === null);
$isset = isset($var);
var_dump($var);
var_dump($isnull);
var_dump($isnull2);
var_dump($isset);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

95.59 ms | 1284 KiB | 5 Q